5850 BE black screen

Just installed a working 5850 BE, and for the first few mins i was happy, updated to catalyse 11.2 and ran 3dmark06, but under the test the screen just made orange lines, and now its just black..

I can hear the computer working with no problems but the screen is just black.
Old gfx can be used no problem there.
tryed uninstalling ati driver, still no good.

Ive reset the board jumpers and i could get the the bios, but when i syed use default it just became white screen insted -.-

moather board is a asus p5b updated to bios 210* anyone got a good advice really need it !

thanks